We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Can Non-Kramers Tm<sup>III</sup> Mononuclear Molecules be Single-Molecule Magnets (SMMs)?
- Authors
Meng, Yin‐Shan; Qiao, Yu‐Sen; Zhang, Yi‐Quan; Jiang, Shang‐Da; Meng, Zhao‐Sha; Wang, Bing‐Wu; Wang, Zhe‐Ming; Gao, Song
- Abstract
In recent years, plentiful lanthanide-based (TbIII, DyIII, and ErIII) single-molecule magnets (SMMs) were studied, while examples of other lanthanides, for example, TmIII are still unknown. Herein, for the first time, we show that by rationally manipulating the coordination sphere, two thulium compounds, 1[(Tp)Tm(COT)] and 2[(Tp*)Tm(COT)] (Tp=hydrotris(1-pyrazolyl)borate; COT=cyclooctatetraenide; Tp*=hydrotris(3,5-dimethyl-1-pyrazolyl)borate), can adopt the structure of non-Kramers SMMs and exhibit their behaviors. Dynamic magnetic studies indicated that both compounds showed slow magnetic relaxation under dc field and a relatively high effective energy barrier (111 K for 1, 46 K for 2). Magnetic diluted 1 a[(Tp)Tm0.05Y0.95(COT)] and 2 a[(Tp*)Tm0.05Y0.95(COT)] even exhibited magnetic relaxation under zero dc field. Relativistic ab initio calculations combined with single-crystal angular-resolved magnetometry measurements revealed the strong easy axis anisotropy and nearly degenerated ground doublet states. The comparison of 1 and 2 highlights the importance of local symmetry for obtaining Tm SMMs.
- Subjects
RARE earth metals; SINGLE molecules; MAGNETS; MAGNETIC materials; THULIUM
- Publication
Chemistry - A European Journal, 2016, Vol 22, Issue 14, p4704
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201600023